Phil Johnson, M.D. discusses issues in HIV prevention related to honest disclosure and communication. People who wish to have sex with a new partner may lie about their status, saying it's negative when it's positive or unknown. People may also tell a partner they are being faithful in a monogamous relationship when in fact they are having sex outside the relationship as well. This means that if you have unprotected sex with a partner, you are betting your life on their being honest with you. Therefore, it's safer to use a condom if you are sexually active.